eupnea , auch: eupnoea

The medical term for normal relaxed breathing is eupnea.

In eupnea, expiration employs only the elastic recoil of the lungs.

The normal inspiration rate and rhythm is called eupnea, and difficult respiration is termed dyspnea.

Rates of breathing are described with the terms eupnea, bradypnea (slow), and tachypnea (fast).

During eupnea, neural output to respiratory muscles is highly regular, with rhythmic bursts of activity during inspiration only to the diaphragm and external intercostal muscles.

A normal respiratory rate is termed eupnea, an increased respiratory rate is termed tachypnea and a lower than normal respiratory rate is termed bradypnea.

In the human respiratory system, eupnea or eupnoea (Greek eupnoia; from eu, well + pnoia, breath) is normal, good, unlabored ventilation, sometimes known as quiet breathing or resting heart rate.

Whilst under most circumstances, individuals respire via eupnea, exercise and other forms of physiological stress can cause the body to require forced expiration, rather than the simple elastic recoil of the thoracic cage, lungs and diaphragm.